Golf club head having complex striking plate structure

ABSTRACT

A golf club head includes a golf club head body and a striking plate connected thereto. The striking plate includes a first plate, a second plate and elastically deformable spaces. The first plate has a front surface to provide a striking surface, and a rear surface to provide a first connecting surface. The second plate has a front surface to provide a second connecting surface, and a rear surface. The first connecting surface of the first plate is attached to the second connecting surface of the second plate to form the striking plate which is connected to a front portion of the golf club head body. The elastically deformable spaces are formed between the first connecting surface of the first plate and the second connecting surface of the second plate.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a golf club head having a complexstriking plate structure. Particularly, the present invention relates tothe complex striking plate structure of the golf club head formed withmultiple metal/nonmetal plates combined together. More particularly, thepresent invention relates to the complex striking plate structure of thegolf club head having elastically deformable spaces provided between twometal/nonmetal plates.

2. Description of the Related Art

A conventional golf club head, as described in Taiwanese PatentPublication No. 550106, entitled “JOINING METHOD FOR GOLF CLUB HEAD,”discloses the following steps:

-   -   1. Preparing a first metal plate and a second metal plate made        from a first metal and a second metal which are heterogeneous        metals;

2. Joining the first metal plate and the second metal plate to form acomplex metal plate by explosion welding;

-   -   3. Shaping the complex metal plate into a first part (i.e.        striking plate) of the golf club head having a first peripheral        configuration;    -   4. Removing a central portion (i.e. sweet spot) of the second        metal plate from the first part to form a peripheral portion        thereof;    -   5. Preparing a second part (i.e. club head body) of the golf        club head having a second peripheral configuration corresponding        to the first peripheral configuration of the first part of the        golf club head, and the second part made from the second metal;    -   6. Abutting the first peripheral configuration of the first part        against the second peripheral configuration of the second part        by arranging the first metal plate of the first part at an outer        surface of the golf club head; and

7. Welding the second metal of the first part to the second metal of thesecond part to form the golf club head.

Although such a striking plate can be successful in providing a highdegree of elastic deformability in the central for impacting a golfball, it can have several disadvantages. A number of design limitationsexist for such a striking plate due to (1) difficulties inmanufacturing, and (2) problematic aspects which naturally occur duringuse. The primary problem with the structure of such a striking plate isthe difficulty in forming a recessed hole on the second metal plate ofthe striking plate since it may sophisticate the steps of manufacture,and increase manufacture cost.

With regard to the problematic aspects which naturally occur during use,such a striking plate susceptible to a number of problems, including:(1) loss of the structural strength of the central portion of thestriking plate; and (2) weakness of the combined relationship betweenthe two metal plates of the complex striking plate. The primary problemwith the structure of such a striking plate is due to the fact that thecentral portion (i.e. sweet spot) of the striking plate has a relativelythin thickness. Although it would be advantage to make the centralportion of the striking plate from thinner material with a higher degreeof elastic deformability, the thinner first plate of the striking plateis susceptible to distortion or crack in the central portion, afterlong-term use, due to a greater stress or impact in repeatedly strikinga golf ball. However, the thin central portion of the striking plate hasa thickness substantially identical with that of the first metal platewhich may weaken the entire strength of the striking plate.

Another problem with the structure of such a striking plate is weaknessof the welding portion due to the fact that only the peripheral portionof the second metal plate is combined with the first metal plate. Thefirst metal plate may peel off or fall off from the second metal plateof the striking plate which is connected with the golf club head bodyafter long-term use. This may reduce the useful life of the golf clubhead.

As is described in greater detail below, the present invention intendsto provide a golf club head having a complex striking plate structureincluding a first plate and a second plate combined together.Elastically deformable spaces are provided between the first plate andthe second plate, and one of which is provided with upraised engagingmembers. The second plate is further combined with a third plate toenhance the elastic deformability of the complex striking platestructure in such a way as to mitigate and overcome the above problem.

SUMMARY OF THE INVENTION

The primary objective of this invention is to provide a golf club headhaving a complex striking plate structure, wherein a first plate and asecond plate are combined to form a striking plate. Elasticallydeformable spaces are formed between the first plate and the secondplate so as to provide a high degree of elastic deformability of thestriking plate. Accordingly, the complex striking plate structure canenhance the striking stability of the golf club head.

The secondary objective of this invention is to provide the golf clubhead having the complex striking plate structure, wherein one of thefirst plate and the second plate provided with upraised engagingmembers. Each of the elastically deformable spaces can be definedbetween any two of the adjacent upraised engaging members. Accordingly,the complex striking plate structure provided with the upraised engagingmembers can enhance the striking stability of the golf club head.

Another objective of this invention is to provide the golf club headhaving the complex striking plate structure, wherein a first plate, asecond plate and a third plate are combined to form a striking plate. Afirst series of elastically deformable spaces is formed between thefirst plate and the second plate while a second series of elasticallydeformable spaces is formed between the second plate and the thirdplate. Accordingly, the complex striking plate structure provided withtwo series of elastically deformable spaces further enhances thestriking stability of the golf club head.

The golf club head in accordance with an aspect of the present inventionincludes a golf club head body and a striking plate. The striking plateincludes a first plate, a second plate and elastically deformablespaces. The first plate has a front surface to provide a strikingsurface for impacting a golf ball, and a rear surface to provide a firstconnecting surface for confronting with the second plate. The secondplate has a front surface to provide a second connecting surface forconfronting with the first plate, and a rear surface exposed in an innerspace of the golf club head body. The first connecting surface of thefirst plate is attached to the second connecting surface of the secondplate to form the striking plate which is connected to a front portionof the golf club head body. The elastically deformable spaces are formedbetween the first connecting surface of the first plate and the secondconnecting surface of the second plate.

In a separate aspect of the present invention, one of the first plateand the second plate is provide with upraised engaging members, and eachof the elastically deformable spaces is defined between any two of theadjacent upraised engaging members.

In a yet further separate aspect of the present invention, a connectinglayer existed between the first plate and the second plate separates anytwo of the adjacent elastically deformable spaces.

In a yet further separate aspect of the present invention, the upraisedengaging member has a tilt to a side.

In a yet further separate aspect of the present invention, any two ofthe upraised engaging members tilt to opposite sides or toward eachother.

In a yet further separate aspect of the present invention, the upraisedengaging member includes an upright flat wall and a curved end wallconnected thereto.

In a yet further separate aspect of the present invention, each side ofthe upraised engaging members is formed from an inclined surface havingan inclination to the second connecting surface of the second plate.

In a yet further separate aspect of the present invention, any two ofthe adjacent upraised engaging members define a V-shaped grooveextending across the second connecting surface of the second plate.

In a yet further separate aspect of the present invention, the secondplate is made from a single sheet formed with a series of square waves.

In a yet further separate aspect of the present invention, the firstplate includes a plurality of protruded reinforcing memberscorresponding to the upraised engaging members of the second plate.

In a yet further separate aspect of the present invention, the protrudedreinforcing members and the upraised engaging members are arranged in astaggered manner when the first plate and the second plate are combinedtogether.

In a yet further separate aspect of the present invention, the protrudedreinforcing member is in contact with the second connecting surface ofthe second plate.

In a yet further separate aspect of the present invention, the protrudedreinforcing members are selected from reinforcing blocks to engage withthe upraised engaging members of the second plate.

In a yet further separate aspect of the present invention, each of theprotruded reinforcing members extends into any two of the adjacentupraised engaging members, and is not in contact with the secondconnecting surface of the second plate.

In a yet further separate aspect of the present invention, the complexstriking plate further including a third plate attached to the secondplate such that the second plate is sandwiched in-between the firstplate and the third plate.

In a yet further separate aspect of the present invention, theelastically deformable spaces are further formed between the secondplate and the third plate.

Further scope of the applicability of the present invention will becomeapparent from the detailed description given hereinafter. However, itshould be understood that the detailed description and specificexamples, while indicating preferred embodiments of the invention, aregiven by way of illustration only, since various will become apparent tothose skilled in the art from this detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will become more fully understood from thedetailed description given hereinbelow and the accompanying drawingswhich are given by way of illustration only, and thus are not limitativeof the present invention, and wherein:

FIG. 1A is a cross-sectional view illustrating a complex striking platestructure in accordance with a first embodiment of the present inventionapplied to an iron-type golf club head;

FIG. 1B is a cross-sectional view illustrating the complex strikingplate structure in accordance with the first embodiment of the presentinvention applied to a wood-type golf club head;

FIG. 2 is a fragmental, enlarged cross-sectional view illustrating thecomplex striking plate structure having a first plate and a second platecombined together in accordance with the first embodiment of the presentinvention, as depicted in FIGS. 1A and 1B;

FIG. 3 is a fragmental, enlarged cross-sectional view, similar to FIG.2, illustrating the complex striking plate structure having the firstplate and the second plate combined together in accordance with a secondembodiment of the present invention;

FIG. 4 is a fragmental, enlarged cross-sectional view, similar to FIG.2, illustrating the complex striking plate structure having the firstplate and the second plate combined together in accordance with a thirdembodiment of the present invention;

FIG. 5 is a fragmental, enlarged cross-sectional view, similar to FIG.2, illustrating the complex striking plate structure having the firstplate and the second plate combined together in accordance with a fourthembodiment of the present invention;

FIG. 6 is a fragmental, enlarged cross-sectional view, similar to FIG.2, illustrating the complex striking plate structure having the firstplate and the second plate combined together in accordance with a fifthembodiment of the present invention;

FIG. 7 is a fragmental, enlarged cross-sectional view, similar to FIG.2, illustrating the complex striking plate structure having the firstplate and the second plate combined together in accordance with a sixthembodiment of the present invention;

FIG. 8 is a fragmental, enlarged cross-sectional view, similar to FIG.2, illustrating the complex striking plate structure having the firstplate and the second plate combined together in accordance with aseventh embodiment of the present invention;

FIG. 9 is a fragmental, enlarged cross-sectional view, similar to FIG.2, illustrating the complex striking plate structure having the firstplate and the second plate combined together in accordance with aneighth embodiment of the present invention; and

FIG. 10 is a fragmental, enlarged cross-sectional view, similar to FIG.2, illustrating the complex striking plate structure having a firstplate, a second plate and a metal combined together in accordance with aninth embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Referring initially to FIGS. 1A and 1B, views of two golf club headseach having a complex striking plate structure in accordance with afirst embodiment of the present invention are shown. Preferably, thegolf club head utilized in practicing the embodiment of the presentinvention can be selected from iron-type club head, a wood-type clubhead or a putter-type club head. By way of example, the golf club headutilized in practicing this illustrated embodiment of the presentinvention is selected from an iron-type club head or a wood-type clubhead.

With continued reference to FIGS. 1A and 1B, the golf club head inaccordance with the first embodiment of the present invention includes agolf club head body designated numeral 1 and a complex striking platedesignated numeral 2. The golf club head body 1 has an opening 10 and aconnecting end portion 11 at its front side. The connecting end portion11 of the golf club head body 1 delimits a periphery of the opening 10,and connects with the complex striking plate 2 in the intended manner.

It will be appreciated that the complex striking plate 2 of the firstembodiment of the present invention may be implemented using two plateswhich are combined together to form a two-layer striking plate as isdescribed in more detail below. Alternatively, the complex strikingplate 2 may be implemented using three plates combined together to forma three-layer striking plate. In the present invention, the term“complex” refers to a multi-layer plate.

Turning now to FIG. 2, a fragmental, enlarged cross-sectional view ofthe complex striking plate structure, depicted in FIGS. 1A and 1B, inaccordance with the first embodiment of the present invention is shown.Referring now to FIGS. 1A, 1B and 2, the complex striking plate 2includes a first plate 21 and a second plate 22 combined together in asubstantially parallel relationship. The first plate 21 and the secondplate 22 are preferably made from similar or dissimilar metals. Thefirst plate 21 may have a peripheral outline corresponding to that ofthe second plate 22. A series of elastically deformable spaces 23 isprovided between the first plate 21 and the second plate 22 forproviding a high degree of elastic deformability of the complex strikingplate 2 in striking a golf ball (not shown).

With continued reference to FIGS. 1A and 1B, constructions of the firstplate 21 shall be described in further detail. The first plate 21 has afront surface to provide a striking surface 211 for impacting the golfball (not shown), and a rear surface to provide a first connectingsurface 212 for confronting with the second plate 22. An upright bentwall 213 is formed from a peripheral edge of the first plate 21 to covera peripheral edge of the second plate 22, by particularly referring toFIG. 1A. In a preferred embodiment, the upright bent wall 213 extendsreward a predetermined distance so as to enhance the elasticdeformability of the complex striking plate 2. The upright bent wall 213is designed to provide a second connecting end portion 214 to connectwith the first connecting end portion 11 of the golf club head body 1when the golf club head body 1 and the complex striking plate 2 areassembled. It is apparent from FIG. 1A that the complex striking plate 2can be implemented on an iron-type club head. However, those skilled inthe art will recognized that such an upright bent wall 213 of thecomplex striking plate 2 may be implemented on an iron-type club head orother club head without departing from the scope of the invention.

Referring back to FIG. 1B, in an alternative embodiment, the first plate21 is designed to provide a second connecting periphery 215 which mayextend beyond the peripheral edge of the second plate 22 when the firstplate 21 and the second plate 22 are combined. In this preferredembodiment, the golf club head is absent the complex striking plate 2that has the upright bent wall 213 formed from the first plate 21 forthe sake of simplicity of the structure. It is apparent from FIG 1B thatthe complex striking plate 2 can be implemented on a wood-type club headwithout departing from the scope of the invention. However, thoseskilled in the art will recognized that such a type of the complexstriking plate 2 may be implemented on an iron-type club head or otherclub head without departing from the scope of the invention.

Referring again to FIGS. 1A, 1B and 2, the first plate 21 has an areagreater than that of the second plate 22. In the first embodiment, thepercentage of the area of the first plate 21 occupied by the secondplate 22 may vary according to design needs. Those skilled in the artwill recognized that the second plate 22 occupies an entire area ofsweet spot of the complex striking plate 2. In striking a golf ball, thesecond plate 22 can reinforce the structural strength of the first plate11 of the complex striking plate 2.

With continued reference to FIGS. 1A and 1B, the golf club head body 1may be made from metals. Examples of suitable metals include carbonsteel, stainless steel (17-4PH stainless steel), alloy steel, Fe—Mn—Alalloy, nickel-based alloy, cast iron, super alloy steel, titanium alloy,copper alloy and aluminum alloy. Alternatively, the golf club head body1 may be made from nonmetal such as carbon fiber.

With continued reference to FIGS. 1A and 1B, the first plate 21 of thecomplex striking plate 2 is made from a metal possessing a high degreeof elastic deformability characteristic. For example, the metal materialof the first plate 21 is preferably selected from the group consistingof stainless steel, carbon steel, alloy steel, Fe—Mn—Al alloy titaniumalloy, copper alloy and aluminum alloy.

With continued reference to FIGS. 1A and 1B, the second plate 22 of thecomplex striking plate 2 is made from a metal possessing a high degreeof vibration absorbability characteristic. For example, the metalmaterial of the second plate 22 is preferably selected from the groupconsisting of carbon steel, low carbon steel, stainless steel (17-4PHstainless steel), alloy steel, nickel-based alloy, cast iron, titaniumalloy, copper alloy, aluminum alloy and super alloy steel.Alternatively, the second plate 22 may be made from nonmetal such ascarbon fiber.

Referring again to FIG. 2, the first plate 21 is formed from a one-pieceflat plate which is in an ordinary or common form. Attached to the firstplate 21 is the second plate 22 for reinforcing the structure.Constructions of the second plate 22 shall be described in furtherdetail. Preferably, the second plate 22 is also formed from a one-piecemember. The second plate 22 has a second connecting surface 221, a rearsurface 222 and a plurality of upraised engaging members 223. The secondconnecting surface 221 is designed to connect with the first connectingsurface 212 of the first plate 21. In a preferred embodiment, the firstplate 21 and the second plate 22 are made from dissimilar metals ormaterials.

With continued reference to FIG. 2, the upraised engaging members 223are equi-spaced on the second connecting surface 221, and aresubstantially parallel each other. In a preferred embodiment, each ofthe upraised engaging members 223 is formed from an upright rib which isprotruded a predetermined length from the second connecting surface 221.Any two of the adjacent upraised engaging members 223 define alongitudinal groove extending across the second connecting surface 221of the second plate 22. In assembling operation of the complex strikingplate 2, the upraised engaging members 223 of the second plate 22 areconnected with the first connecting surface 212 of the first plate 21.The upraised engaging members 223 of the second plate 22 are functionedto uniformly transmit a stress due to a golf ball impacted on the firstplate 21. In a preferred embodiment, the upraised engaging members 223of the second plate 22 may be surface relief structures of the secondconnecting surface 221.

With continued reference to FIG. 2, each of the elastically deformablespaces 23 is defined between the first connecting surface 212 of thefirst plate 21 and any two of the adjacent upraised engaging members 223of the second plate 22. The series of the elastically deformable spaces23 arranged between the first plate 21 and the second plate 22 isdesigned to provide a high degree of elastic deformability of thecomplex striking plate 2. The elastically deformable spaces 23 caneffectively enhance elastic deformations of the first connecting surface212 of the first plate 21 while impacting the golf ball (not shown).Accordingly, the first plate 21 of the complex striking plate 2 canprovide a better rebound factor in striking the golf ball.

With continued reference to FIG. 2, in combining operation, the secondplate 22 covers the entire area of the sweet spot of the first plate 21which may be located at a center portion of the first plate 21. In apreferred embodiment, the first plate 21 and the second plate 22 arecombined by means of suitable manners, including braze welding,explosion welding, press rolling and adhesion. A series of connectinglayers are formed between the first connecting surface 212 of the firstplate 21 and the upraised engaging member 223 of the second plate 22when braze welding, explosion welding or press rolling is applied to thecomplex striking plate 2. The connecting layer may be one of brazewelding layer, explosion welding layer, press rolling layer.Alternatively, a series of adhesive-connecting layer are also formedbetween the first connecting surface 212 of the first plate 21 and theupraised engaging member 223 of the second plate 22 when adhesive isutilized. In this embodiment, the connecting layer separates any two ofthe adjacent elastically deformable spaces 23.

Turning now to FIG. 3, a fragmental, enlarged cross-sectional view ofthe complex striking plate structure of the golf club head in accordancewith a second embodiment of the present invention is shown. Incomparison with the first embodiment, the upraised engaging member 223of the second embodiment tilts a predetermined angle with respect to thesecond connecting surface 221 of the second plate 22 to form a tiltedrib. Each of the upraised engaging members 223 has a tilt to a side.Preferably, any two of the upraised engaging members 223 tilt toopposite sides or toward each other.

Turning now to FIG. 4, a fragmental, enlarged cross-sectional view ofthe complex striking plate structure of the golf club head in accordancewith a third embodiment of the present invention is shown. In comparisonwith the first embodiment, the upraised engaging member 223 of the thirdembodiment includes an upright flat wall and a curved end wall connectedthereto. The upright flat wall has a distal end connecting with thecurved end wall. In assembling operation of the complex striking plate2, two ends of the curved end wall of the upraised engaging member 223connect with the first connecting surface 212 of the first plate 21.

Turning now to FIG. 5, a fragmental, enlarged cross-sectional view ofthe complex striking plate structure of the golf club head in accordancewith a fourth embodiment of the present invention is shown. Incomparison with the first embodiment, each side of the upraised engagingmembers 223 of the fourth embodiment is formed from an inclined surfacehaving an inclination to the second connecting surface 221 of the secondplate 22. In this embodiment, any two of the adjacent upraised engagingmembers 223 define a V-shaped groove extending across the secondconnecting surface 221 of the second plate 22. Consequently, theupraised engaging members 223 are shaped in a saw-toothed form.

Turning now to FIG. 6, a fragmental, enlarged cross-sectional view ofthe complex striking plate structure of the golf club head in accordancewith a fifth embodiment of the present invention is shown. In comparisonwith the first embodiment, the second plate 22 of the fifth embodimentis made from a single sheet formed with a series of square waves.Preferably, the second plate 22 may be formed in a single stampingoperation. Accordingly, the upraised engaging members 223 of the secondplate 22 are peaks of the square waves such that the elasticallydeformable spaces 23 are defined between the first connecting surface212 of the first plate 21 and wave troughs of the square waves.

Turning now to FIG. 7, a fragmental, enlarged cross-sectional view ofthe complex striking plate structure of the golf club head in accordancewith a sixth embodiment of the present invention is shown. In comparisonwith the first embodiment, the first plate 21 of the sixth embodimentfurther includes a plurality of protruded reinforcing members 216corresponding to the upraised engaging members 223 of the second plate22. The protruded reinforcing members 216 are equi-spaced and extendedacross the first connecting surface 212 of the first plate 21. Each ofthe protruded reinforcing members 216 is preferably formed from anupright rib which is protruded a predetermined length from the firstconnecting surface 212 of the first plate 21. Advantageously, athickness of the first plate 21 can be relatively thin due to the factthat the protruded reinforcing members 216 reinforce the entirestructure of the first plate 21.

In assembling operation, each of the protruded reinforcing members 216of the first plate 21 correspondingly extends into any two of theadjacent upraised engaging members 223 of the second plate 22 so as todefine the elastically deformable spaces 23 of the complex strikingplate 2. In this way, the protruded reinforcing members 216 and theupraised engaging members 223 are arranged in a staggered manner whenthe first plate 21 and the second plate 22 are combined together.Preferably, the protruded reinforcing members 216 are in contact withthe second connecting surface 221 of the second plate 22. Each of theelastically deformable spaces 23 is arranged between the protrudedreinforcing members 216 and the upraised engaging members 223.

Turning now to FIG. 8, a fragmental, enlarged cross-sectional view ofthe complex striking plate structure of the golf club head in accordancewith a seventh embodiment of the present invention is shown. Incomparison with the sixth embodiment, the protruded reinforcing members216 of the seventh embodiment are selected from reinforcing blocks toengage with the upraised engaging members 223 of the second plate 22.The first plate 21 possesses a high degree of elastic deformability byusing such an arrangement of the protruded reinforcing members 216 andthe upraised engaging members 223.

Turning now to FIG. 9, a fragmental, enlarged cross-sectional view ofthe complex striking plate structure of the golf club head in accordancewith an eighth embodiment of the present invention is shown. Theprotruded reinforcing members 216 and the upraised engaging members 223are arranged in a staggered manner when the first plate 21 and thesecond plate 22 are combined together. In comparison with the sixthembodiment, each of the protruded reinforcing members 216 of the eighthembodiment extends into any two of the adjacent upraised engagingmembers 223, and is not in contact with the second connecting surface221 of the second plate 22. Using such an arrangement of the protrudedreinforcing members 216 can be successful in reducing the thickness ofthe first plate 21, and cannot affect the elastic deformability of thefirst plate 21.

Turning now to FIG. 10, a fragmental, enlarged cross-sectional view ofthe complex striking plate structure of the golf club head in accordancewith a ninth embodiment of the present invention is shown. In comparisonwith the first embodiment, the complex striking plate 2 further includesa third plate 24 for reinforcing the second plate 22 such that thesecond plate 22 is sandwiched in-between the first plate 21 and thethird plate 24. Preferably, the second plate 22 is made from a singlesheet formed with a series of sine waves. Examples of suitable shapes ofthe second plate 22 in implementing the present invention may includesquare waves, triangular waves, zigzag shapes and other wavy shapes. Aseries of elastically deformable spaces 25 are further formed betweenthe second plate 22 and the third plate 24.

In combining operation, the third plate 24 is attached to the rearsurface 222 of the second plate 22. Preferably, the third plate 24 isformed from a one-piece flat plate which is in an ordinary or commonform. The third plate 24 is made from a material possessing a highdegree of elastic deformability or vibration absorbabilitycharacteristic. For example, the metal material of the third plate 24possessing elastic deformability characteristic is preferably selectedfrom the group consisting of stainless steel, carbon steel, alloy steel,Fe—Mn—Al alloy titanium alloy, copper alloy and aluminum alloy.Alternatively, the material of the third plate 24 possessing vibrationabsorbability characteristic may be selected from the group consistingof carbon steel, low carbon steel, stainless steel (17-4PH stainlesssteel), alloy steel, nickel-based alloy, cast iron, titanium alloy,copper alloy, aluminum alloy, super alloy steel and nonmetal materialsuch as carbon fiber.

Referring back to FIGS. 3 through 10, combining means for using betweenthe first plate 21 and the second plate 22 or between the second plate22 and the third plate 24 described in the second to ninth embodimentsare the same with that of the first embodiment, and the detaildescriptions thereof are omitted for the sake of clarity.

It will be apparent from the aforementioned discussions that although itwould be advantageous to design a conventional striking plate providedwith the separate second plate, thereby successfully reducing thethickness of the first plate, the structure of the complex strikingplate is weakened or the elastic deformability of the complex strikingplate is affected. Conversely, the second plate 22 of the presentinvention can enhance performing a high degree of the elasticdeformability of the first plate 21. Furthermore, the third plate 24 ofthe present invention can be used to adjust the elastic deformabilityand vibration absorbability of the complex striking plate 2 in strikingthe golf ball. Meanwhile, the third plate 24 of the present inventioncan also reinforce the strength of the entire structure of the complexstriking plate 2.

Although the invention has been described in detail with reference toits presently preferred embodiment, it will be understood by one ofordinary skill in the art that various modifications can be made withoutdeparting from the spirit and the scope of the invention, as set forthin the appended claims.

1. A golf club head, comprising: a golf club head body; a first platehaving a front surface to provide a striking surface, and a rear surfaceto provide a first connecting surface; a second plate having a secondconnecting surface, a rear surface and a plurality of upraised engagingmembers, the second connecting surface being attached to the firstconnecting surface of the first plate to form a complex striking plate;and at least one elastically deformable space formed between the firstconnecting surface of the first plate and the second connecting surfaceof the second plate; wherein the complex striking plate connects withthe golf club head body to provide a degree of elastic deformabilitywhile striking a golf ball.
 2. The golf club head as defined in claim 1,further including a plurality of upraised engaging members formed on thesecond connecting surface of the second plate to engage with the firstconnecting surface of the first plate.
 3. The golf club head as definedin claim 2, wherein formed between the first connecting surface of thefirst plate and the upraised engaging member of the second plate is aconnecting layer selectively formed from one of a braze welding layer,an explosion welding layer, a press rolling layer and an adhesive layer.4. The golf club head as defined in claim 2, wherein the upraisedengaging member formed from an upright rib, a tilted rib or asaw-toothed member.
 5. The golf club head as defined in claim 2, whereinthe second plate is made from a single sheet formed with sine waves,square waves, triangular waves or zigzag shapes.
 6. The golf club headas defined in claim 1, further including a plurality of protrudedreinforcing members formed on the first connecting surface of the firstplate.
 7. The golf club head as defined in claim 6, wherein theprotruded reinforcing members are formed from upright ribs or uprightblocks.
 8. The golf club head as defined in claim 6, wherein theprotruded reinforcing members and the upraised engaging members arearranged in a staggered manner when the first plate and the second plateare combined together.
 9. The golf club head as defined in claim 6,wherein the protruded reinforcing members engage with the upraisedengaging members when the first plate and the second plate are combinedtogether.
 10. The golf club head as defined in claim 1, wherein each ofthe protruded reinforcing members extends into any two of the adjacentupraised engaging members, and is not in contact with the secondconnecting surface of the second plate.
 11. The golf club head asdefined in claim 1, further including a third plate attached to the rearsurface of the second plate.
 12. The golf club head as defined in claim11, wherein another elastically deformable space is formed between thesecond plate and the third plate.
 13. The golf club head as defined inclaim 11, wherein the third plate is made from a material possessing ahigh degree of elastic deformability.
 14. The golf club head as definedin claim 11, wherein the third plate is made from a material possessinga high degree of vibration absorbability.
 15. A golf club head,comprising: a golf club head body; a complex striking plate connectedwith the golf club head body, the complex striking plate having a firstplate and a second plate; a plurality of elastically deformable spacesformed between the first plate and the second plate; and a plurality ofconnecting layers formed between the first plate and the second plate,the connecting layer separating any two of the adjacent elasticallydeformable spaces; wherein the elastically deformable spaces of thecomplex striking plate provides a degree of elastic deformability whilestriking a golf ball.
 16. The golf club head as defined in claim 15,wherein the connecting layer is selectively formed from one of a brazewelding layer, an explosion welding layer, a press rolling layer and anadhesive layer.
 17. The golf club head as defined in claim 15, whereinthe complex striking plate further including a third plate attached to arear surface of the second plate.
 18. The golf club head as defined inclaim 15, wherein another elastically deformable spaces are formedbetween the second plate and the third plate.
 19. The golf club head asdefined in claim 15, wherein the third plate is made from a materialpossessing a high degree of elastic deformability.
 20. The golf clubhead as defined in claim 15, wherein the third plate is made from amaterial possessing a high degree of vibration absorbability.